Duplex pump and condenser



(No Model.) a Sheets-Sheet 1. J. REID.

DUPLEX PUMP AND CONDENSER.

No. 399,780, Patented Mar. 19, 1889.

ATTORNEYS.

. 3 Sheets-Sheet 2. J. REID.

Patented Mar. 19, 1889.

g BY MW ATTORNEYS.

WITNESSES (N l.) 3 Sheets-Sheet a.

J. REID.

DUPLEX PUMP AND CONDENSER.

No. 399,780. 4 Patented Mar. 19, 1889..

WITNESSES E INVENTOB:

N ATTORNEYS.

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JOHN REID, OE RIO DE JANEIRO, BRAZIL.-

DUPLEX PUMP AND CONDENSER.

SPECIFICATION forming part of Letters Patent No. 399,780, dated March 19, 1889.

Application filed May 2, 1888. Serial No. 272,540. (No model.)

T 0 all whom it may concern:

Be it known that 1, JOHN REID, of Rio de Jan eiro, Brazil, South America, have invented a new and Improved Duplex Pump and (ondenser, of which the following is a full, clear, and exact description.

My invention relates to a duplex pump and condenser adapted more particularly for marine service, but useful in other sit1.1ations; an d the invention has for its object to provide a simple and efficient apparatus of this character.

The invention consists in certain novel fea tures of construction and combinations of parts of the pump and condenser, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a longitudinal vertical sectional elevation of my duplex pump and condenser. Fig. 2 is a central. vertical transverse section thereof, taken on the line at a", Fig. 1. Fig. 3 is a plan view of the pump and condenser; and Fig. a is a horizontal section taken through the condenser and on the line 11 3/, Fig. l.

The duplex pump and condenser apparatus has a hollow bed or base, A, divided by a transverse partition, a, into two chambers, B 0, opening to water-inlets (Z c, to which are fitted series of flap or check valves 13' l, which open upward and control inflow of water to the chambers B C, respectively. At opposite ends of the bed A, and preferably directly over the inlet-s I) 0, two cylinders, l) E, are supported, and between these cylinders the condenser F is also supported. on the bed. The cylinders ,D E open at their bottoms for direct and free inlet of water to them from the chambers B C, respectively, and the condenser communicates with the chambers B 0, respectively, byinlets g h, controlled by valves G H, made like those, 3' C, above mentioned. The cylinders D E are provided, respectively, with two pistons, D D and E E which are respectively held to two rods, (Z c, which are connected to the opposite ends of a beam, 1, which is preferably made in the skeleton form shown, and is fulcrumed at i in bearings on pillow-blocks J J, mounted on a plate, j, which forms the cap or top plate of the condenser.

The condenser F is made with an outer case, preferably having the elongated form most clearly shown in Figs. 3 and 4 of the drawings, and provided with lower and upper transverse or horizontal partitions, f f forming chambers F F at the bottom and top of the condenser, and which have communication with each other only through a series of pipes or tubes, f, which are expanded into the plates ff and provide around and between them and between the upper and lower plates, f f, a space or chamber to receive the steam exhausted from the p Limp-cylinders D E, in a manner presently explained. A flanged collar, F fixed to the upper part of the body of the condenser, communicates with the upper chamber, F thereof and is the outlet for the water forced upward through the condenser-tubesf. Man-hole platesf 3 f fitted at the top and bottom parts of the condenser, give access to its chambers F F and the valves G H for inspection, cleaning, or repair of the parts.

Separate steam inlet and. exhaust valves are provided for each of the main cylinders D E of the apparatus, and the pair of valves for each cylinder are connected to a stem actuated from the walking-beam I, as next described.

The steam and exhaust piston-valves K L for the cylinder D are fixed at some distance apart upon a rod, m, which passes through stuffing-boxes on the heads of a cylinder, M, to the bore of which the valves K L are fitted, and the steam and exhaust piston-valves N O for the cylinder E are fixed at some distance apart upon a rod, 1'), which passes through stuffingboxes on the heads of a cylinder, P, to the bore of which the valves O are fitted. The steam piston-valves K N are larger in diameter than the exhaust piston-valves L O, and the cylinders M l? have larger and smaller bores or chambers receiving the larger and smaller valves, and forming, respectively, the live-steam and exhaust-steam chambers of the cylinders. The live-steam chambers of the valve-cylinders M 0 have ports or, respectively, which open to opposite ends of a main steam-supply pipe, R, common to both valvecylinders, and having a neck, 0, for connec tion of a steam-supply pipe leading from a steam-boiler, (not shown,) and the exhaust steam chambers of the valve-cylinders M O have ports Z 0, respectively, which open to the upper ends of pipes S T, respectively, which are connected to the cylinders M O, and pass thence downward and are fixed to the end walls of the condenser at points about midway between the upper and lower tube plates, f f, thereof and open into or communicate with the steam-receiving chamber surrounding the pipes f and between the plates f'f of the condenser. Ports U V, connecting the cylinders D E, respectively, with the piston-valve cylinders M P, respectively, provide for passage of both live and exhaust steam to and from the main steam-cylinders D E of the apparatus, as hereinafter more fully explained.

To operate the two series of piston-valves automatically, I connect their aligned stems m p with the opposite ends of a yoke or link, W, which is provided with a couple of crossbars, w w, between which enters the pendent stem or lower part of a lever, X, which is fulcrumed on a shaft or bar, as, fitted in the pillow-blocks J J, and engages by its upper end the slotted extremity of a pendent arm, Y, fixed to the central hub-bearing of the walking-beam l, and whereby as the beam is rocked by the main-cylinder pistons its arm Y will act alternately on the two cross-bars to ur of the yoke W, and thereby actuate the plston-valves K L N O to alternately admit steam to and exhaust it from the main steamcylinders D E, as hereinafter described.

A pump, Z, which may have any approved construction, is operated by a rod, .2, connected to the beam I, and discharges water of condensation from the steam-chamber of the condenser.

The operation of the duplex pump and condenser is as follows: With the valves in the positions shown in Fig. 1 of the drawings, live steam is entering the ports is in the valvecylinder M from the pipe R, and is passing through the port U into the main cylinder D to drive its piston D downward in direction of the arrow 1, and at the same time the piston E in the main cylinder E is moving upward and the steam is exhaustingfrom in front or over it through the main port V and through the ports 0 in the valve-cylinder P into the pipe T, and thence to the steamchamber of the condenser E. On the return-stroke and after the valves L K N O are shifted by the walking-beam through the medium of the arm Y, lever X, and yoke W, the ports k 0 will be closed to live steam and exhaust, and live steam will then enter the ports n of cylinder P from the pipe R, and will pass through the port V to the main cylinder E to drive its piston E downward in direction of arrow 2, and raise the piston D in the opposite cylinder, D, while the steam is exhausting from the latter cylinder through its port U and the ports Z into the pipe S, and thence to the steam-chamber of the condenser, and when the valves are again shifted by the walking-beam connections the valve-cylinder ports 0 will again be opened and live steam will enter the cylinderD while steam is exhausting from the cylinder E, as first described, and so on, the live steam entering one main cylinder while it is exhausting from the other main cylinder, and the two cylinders alternately exhausting into the condenser. The steam-valves L K N O are held to their stems m p by nuts fitted to the stems at each side of each valve, as shown in Fig. 1 of the drawings, thus allowing the valves to be shifted on their stems to control their range of movement relatively to the ports Z ion 0 to secure the highest economy in working the live steam in the main cylinders, and providing for free exhaust of steam therefrom.

Water is supplied to the surface-condenser F for condensing the exhaust-steam by the operation of the two lower pistons, D E, in the main cylinders D E in connection with the automatic working of the valves B C G H, as next described.

As the main piston D and connected piston D rise in the cylinder D, the vacuum produced below the piston D causes the valves B in the chamber B to open and water flows into this chamber, and when the pistons D D descend the valves B will close and the piston D will force the water from the chamber B, through the opening g, past the then open valves G, into the lower chamber, F, of the condenser, and thence through the tubes f and out at the opening F The action of the piston E in the other main cylinder, E, is practically the same. The water is admitted past the open valves G into the chamber C when the piston rises, and as the piston is lowered the valves 0 close and the water is forced through the opening h, past the then open valves H into the condenserchamber F, and thence through the tubes f to the chamber F and outlet F. It is obvious that as water is filling into one of the chambers B or C it is being forced from the other of the two chambers into the condenser, which thus receives a constant water supply for effectively condensing the exhaust-steam, and the water of condensation is taken from the steam-chamber of the condenser by the pump Z.

WVhen economy in fuel is not important, the condenser can be put out of use, and one piston only will then be operated in each of the main cylinders, as will readilybe understood.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A duplex pump and condenser constructed with two main valved steam and water cylinders, pistons operated therein, two valved water chambers, one communicating with each cylinder, and an adjacent condenser receiving exhaust-steam from the two cylinders alternately and also receiving water from the two water-chambers alternately, substantially as herein set forth.

2. A duplex pump and condenser constructed with two main valved steam and Water cylinders, pistons operated therein, two valved Waterchambers, one communicating with each cylinder, an adjacent condenser receiving exhaust-steam from the two cylinders altern ately andalso re zeivin g Water from the two water-chambers alternately, and a pump discharging the water of condensation from the condenser, substantially as herein set forth.

3. A duplex pump and condenser constructed with two main valved steam and water cylinders, pistons operated therein by rods connected to opposite ends of a Walking-beam, two valved water-chambers, one communicating With each cylinder, an adj acent condenser receiving exhaust'steam from the two cylinders alternately and also receiving water from the two water-chambers alternately, and a pump operated by the walking-beam and discharging the water of condensation from the condenser, substantially as herein set forth.

4. A duplex pump and condenser constructed with two main valved steam and water cylinders, two spaced pistons working together in each main cylinder, two valved water-chambers, one communicating with each cylinder, and an adjacent condenser receiving exhauststeam from the two cylinders alternately and also receiving water from the two water-cham bers alternately, substantially as herein set forth.

5. The combination, in a duplex pump, of a bed, A, having water-ch ambers B 0, provided with openings 1) c and inlet-valves B l, and having outlets g 72, two main steam and water cylinders, D E, on the bed A, and provided with ports U V, respectively, and communicating with the chambers 13 G, pistons, as D E, working in the cylinders D E, and connected by rods (Z c with a Walking-beam, I, fulcrumed on the pump-frame,valve-cylinders M P, having inlet-ports 7:; n, communicating with a steamsupply pipe, R, and exhaust-ports Z 0, communicating with steam-outlets, piston-valves K L, working in the cylinder M, and piston-valves N 0, working in the cylinder P, and said valves having connected stems m p, and devices, substantially as described, connecting the valve-stems with the walking-beam for actuating the valves therefrom, substantially as herein set forth. I

(i. In a duplex pump, the combination, W1th two main steam and water cylinders, D E, and pistons, as D E, fitted therein and having rods d e, a walking-beam, I, fulcrumed on the p ump-frame and connected to said piston-rods, two valve-cylinders, M P, valves K L 1n cylinder M, and valves N O in cylinder P, and said cylinders M P having inlet and exhaust ports Z n 0, and rods m p, connectedto the valves K L N O, of a yoke, W',connect1ng the rods m p, a lever, X, engaging the yoke or cross-bars thereof, and an arm, Y, on the beam I, engaging the lever X, all arranged for operation substantially as herein set forth.

7. The combination, in a duplex pump and condenser, of a bed, A, having water-cha nbers B 0, provided with openings 1) c, and 111- let valves B C, and having outlets 9 7L, valved at G H, two main steam and Water cylinders, D E, on the bed A, and provided with main ports U V, respectively, and communicating with the chambers B O, pistons D D in the cylinder D and E E in the cylinder E, a walking-beam, I, journaled on the frame, rods d 6, connecting the pistons in the cylinders D E, respectively, to opposite ends of the beam I, valve-cylinders M P,hav1ng inlet-ports 71: a, communicating with a steam supply pipe, R, and also having exhaust-ports Z 0, communicating with steam-outlets, p stonvalves K L, fitted in the cylinder M, and piston-valves N O, fitted in the cylinder P, and said valves having connected stems m 19, devices, substantially as described, connecting the valve-stems with the walking-beam for actuating the valves therefrom, a condenser, E, valves G H, controlling communlcation between the water-chambers B C and the condenser, and pipes S T, connecting the exhaust-ports Z 0 of the valve-cylinders M P with the steam-chamber of the condenser, all arranged for operation substantially as described, for the purposes set forth.

B. D. ARMSTRONG, H. CLAY ARMSTRONG, Jr. 

